Hand brake



May 31, 1932. 1 F OCONNOR 1,860,549

HAND BRAKE Filed Jan. 27, 1930 vlo f 4 is a detailed *enlargedsectional vievv` of a O proved mechanism.

PaientedMay 31, 1932 JOHN F'ocoNNon, 3F-CHICAGO, ILLINOIS, AssIGNon froW.. H. Minna, INC.,` or CHICAGO,

`ILLINOIS., AgoonronarroN or nnLAv/Anga HANDl BRAKE i,

'y Application ined January a7, i930. serial No. 423,573.7

This invention relates to improvements in hand brakes.V

One object of the invention is to provide a simple `and efficient hand brake mechanism, especially adapted for railway cars, Vwherein all of the operationsare controlled by a single manually actuated means, operation of the same in one direction effecting tightening of the brakes and operationina reverse direc.-

tionV effecting Vcomplete release of the brakes'A With free running ofthe tightening element. 'A further object of the invention is lto provide a. handcbralre mechanism.

of the characagainst rotation in a direction corresponding to the directionof rotation the hold the same reof While the chain is being .Wound on the tightening` means to tighten the brakes, and permittingmovement thereof in a chain Winding direction, y and means cooperatingvvith said operating y means v and actuated byV rotation in'reverse d'- rections of said operating means -formoving the same into operative engage chainwinding means to effect from-'to permit Vfree running Winding drum and Vcomplete brakes.

clearly appear from i 4 the de claims hereinafter following'. f

, In the drawings, vforming apart ment with the tightening of the brakes and disengagin-g the sameV there-y of the chain release of `the speciicatiomfliigure 1 Vis a front elevational view yillustrating my improve mechanism .asV applied to the ure'2 isa vertical`,`sectional vie dk hand brake y end Wallcof a railway car, certain ofthe parts of said mechanism being indicated indotted lines. ,Fige' W ycorresponding substantially to the line 2 2 of Figure 1. Figure 3 isy a vertical, sectional Y vievv in fa plane substantially Yat rightg angles to the sectional view of Figure 2, and corresponde` ing to line 3-3 ofsaidigure.

portion of the clutch A'memloe And Figure y partsvof'the' brake mechanism 1n the usual rs of my im- In said drawings, the endkivall .of the rail-l i 12 has an outer Wall 14 disposed' substantially parallel to the Wall formed by the plate 11 and vspaced therefrom, and a side Wall 15 ei:-l tending along opposite sideszof the' housingy and the top there'osaidtop portion'of theA Wall 15 being kcurved as shown'in Figure 1. The housing is open at the xbottomtoaccom-v vmodate the `brake chain formovement, 'the chainbeing indicated'by 16. The side Wall soi 15-of the'housing isfprovided With three out.

standing lugs which register with the lugs 13 of the plate 117,.v these lugs also being in-y Y' dicated by 13. `The covermember 12 is secured to the plate 11 in any suitable manner,

rivets 17 being. preferably employed Which extend-through the lugs 134-13 of the cover member andthe :plate 11, these rivetskalso serving to secure the entire housing tothe Wall10 of the canas clearly shown inFigure 2,'the rivets extending through saidwall .Y 10. Y

` My Y improvedk brake mechanism propere comprises broadly a chain `Winding drum Ar vrv having a driving gear member B formed integral therewith; a pinion C; an operating shaft D; a hand wheel E; a' slidingvclutch member F mounted on the shaftD and cooperating with the pinion C; andy a spring 'pressed locking dog or ratchetrmember G. f

The chain `Winding drum A comprises a oye adapted to be Wound, said'section Vbeing pro-fv vided with angoutstandingrlug"19 to' which The chain 16-is connected to the operating manner, the connections not being illustratedy in the. draw-ings. At the outer end, the Wind @lindrical section k18 on which the chain k'95V ithe inner end link ofthe chain jis anchored.

Y ing drum is provided with a flange member 20 which, together with an outstanding flange 21 at the opposite end of the cylindrical portion of the drum defines a winding space to accommodate the chain therebetween. The

flange 21 isfof considerably greater radius than the flange 20 and forms the gear member B, being provided with gear teeth 22 on the periphery thereof. The chain winding drum A is rotatably supported on a shaft 23 having its opposite ends mounted respectively in openings provided in the front and rear walls a considerable distance outwardly beyond the wall'14 of the housing and the hand wheel E is mounted thereon. As shown, the outer end of the shaft D is provided with a tapered portion of` substantially square cross section which fits within a tapered opening of similar cross section provided in the hub of the hand wheel E. In order to-lock the hand wheel to the shaft D, `the usual nut 24 is providedony the outer end ofthe shaft D. vThe major 'portion of the shaft is of substantially circular cross section and within the housing the shaft is provided with an integral collar portion 25 substantially midway between the front and rear walls of the housing. Between the collar 25 and the outer wall portion ofthe y housing, the shaft is provided with a screw threaded yportion 26, the threads being preferably left handed.V The pinion C is rotatably supported on the cylindrical portion of the vshaft/D to the right of the collar 25, as viewed in Figure 2, said pinion being freely rotatable on the shaft DV between said collar and the boss formed by the flange surrounding thel bearing opening for the shaft D in the back plate 11`of the housing. v

The clutch member F is of substantially cylindrical formand has threaded engagement with the threads 26 of the shaft D. At the inner end, the member F is provided withl an enlarged portion 27 having ratchet teeth 37 thereon. The enlarged portionk 27 is recessedatthe inner end to provide a socket or seat128 adapted to receive the outer end of the pinion C, saidopening 28 being provided with internal teeth 29-29 adapted to cooperate with the teeth of the pinionC, the tooth members 29-29 being adapted to interlock with the teeth of the pinion C, whereby the outer end of the pinion andthe member' F `together form cooperating clutch means by rsed549 which the shaft D is locked to the pinion C in order `to effect rotation of the latter when winding the brake chain on the drum A. In order to hold the shaft D assembled with the housing of the brake mechanism, a retaining collar 3()V is provided on the ysha-ft D, said collar bearing on the inner side of the Wall 14 of the housing and being secured to the shaft D `by means of a pin 31 extending through said collar-and the shaft. As will be evident, in addition to holding the shaft D assembled with the housing, the collar 30 also limits the outward movement of the clutch member F, that is .movement thereof in a lefthand direction as viewed in Figure 2.

The ratchet or locking doggG which coopcrates with the ratchet teeth 37 ofthe clutch member F, is preferably in the form; of a substantially flat spring plate having an` upstanding tooth 32 thereon which engages withr the teethv of the member F. The plate por` tion of the member Gr is supported at'opposite ends on inwardly lprojecting lugs 33-33 provided on opposite side wall' portions ofthe housing, ther lugs 33 forming supporting shelves for said spring ratchet member G.

The operation of my improved hand brake mechanism in effecting tightening ofl the brakes is as follows: The hand wheel E, assuming thefparts to be in the position shown in Figures land 2, is rotated in. a clockwise direction, as viewed in Figure 1, thereby effecting rotation in a similar direction of the clutch member F, which at this time is in locking engagement with the teeth of the pinion C. As will be evident, due tothe action of the lefthand threaded connection between the shaft D and the clutch. member F, rotation of the hand wheel ini a clockwise direction tends to force the clutch member F to the right, as rviewed inA Figure 2, thereby causing the same to hug the enlarge-y ment or collar 25 of the shaft. The enlargement 25 preventing movement' in a righth'and direction vof the clutch member F. as-

viewed in Figure 2, the same is in effect locked to said shaft. Inasmuch as the pinion C is in engagement rwith the gear- B, the latter is rotated in a contra-clockwisey direction, there-y by effecting similar rotationy of the chain winding drum and winding of the chain 16 on the same, thereby tightening the brakes. As will be evident, during the tightening operation of the brakes backward or retrograde rotation of the chain winding drum is prevented by the locking means G which cooperates wth the ratchet teeth'of the member F. The arrangement of cooperatingteeth of' the member F and the ratchet member G permits rotation of the member YF' in a clockwise4 direction but prevents rotation thereof ina reverse direction. thereby preventing rotationV of the winding drum A -inr a clockwise direction. In ratcheting overthe member 32, the plate member of the ratchet element is bowed downwardly, as viewed in Figure 3.

Inreleasing the bra'lie mechanism, the `hand wheel E is rotated in a contra-clockwise direction, as viewed in Figure l.` inasmuch as the locking member G holds the clutch meniber F against rotation in a contra-clockwise direction, the member F will be fed oiitirard-y ly on the shaft D by meang f the SG1-QW threads 26. As will be evident, the teeth 29of the member F will thus be disengaged fro-m the teeth yof the pinion C, therebyreleasing the latter and permitting free running'fof the chain winding drinn to allow unwinding -of the chain therefrom kandrelease of the brakes. Outward movement of the member F 4eratory to rotate the hand wheel in a righthand direction.` |This operation of the hand wheel ',will effect reengagement of the driving clutch members and further rotation of the handwheel'will then effect tightening of the brake chain. TWhen the hand wheel E is rotated in a clockwise direction, the cooperate ing screw threaded connection between the shaft D andthe member F will cause the lat-r ter to be moved tothe lright on the shaft D to :ce-engage the teeth 29 thereof with the teeth of the` pinion C. Assuming'y that l the teeth 29 ofthe member Fdo not exactly register with the openings between Vthe teeth of the pinion-C, when the ymember F is brought into abutting relationwith the end of the pinion, registration of the teetli29 with the openings between the teeth of rthe pinion C will be effected by rotation of the member F with the shaft D. In this connection, it is pointed out that the memberF shaft' D through the friction of the' sciew threaded connection therewith, the member F being free to ratchet kover the tooth ofk the. locking member G, whenv the same is rotated4 in a clockwise direction. As soon'asthe teeth ltheteeth of the pinion C, the action of the screw threaded connection between the shaft D and the member F will force the teeth 29 into. the openings between the teeth yof the pinion, thereby clutching the shaft D to the pinion C and causing the latter to be rotated in unison therewith, thereby driving the gear B ingthe manner heieinbefore described and effecting tightening of the brake chain on the winding drum A. v

From the preceding description taken in connection with the drawings, it will be evident that I have providedv an exceedingly simple and efcient hand.. brakey mechanism e5' wherein all of the operations of thek same are controlled by a single manually actuated may be rotated with thev member,-in the form ofA ahand wheel-rotas` tion ofthe hand wheel in one directionfeifecting tightening of the brakes and rotation in a: reverse. direction disengaging` the: driving parts so 'as to permit free running of thek chain winding drum and complete release .of the brakes. it further pointed out` thatby providing Vinterengaging clutch means,- one of the members .of which is actuatedby ,the manually controlled operatnigmechanism to operatively engage the same withA the other clutch means,f and byioperatively connecting,y the meansfor preventing retrograde rotation of the chainY winding drumiwith said movable clutchr member, automatic operation of the. clutch mechanismis had, without in any way interfering` with or. changing ,the adjustment of the-means for preventingretrograderotas tion of the 'chain winding element.

. Ihave herein vshown-and described nowconsider vthe preferred manner of carry# ing out my invention, but the same ismerely illustrative-and I "contemplate all changes and modifications that come within the scope of the claims appended hereto. Iclaim: Y i: l. Ina hand Vbrakemechanism, the combination I with a rotary tightening element; fof a driving member connected thereto; a rotary` operatingel'ement; cooperating clutch means on said operating Velement and driving mein- Vao . ber, one of said clutch means being threaded Y on the operating elemennsaid last named] clutch element having ratchet teeth thereon; and a locking dog cooperatingk with said ratchet teeth.

2. ln a hand brake mechanism, the combination with a rotary chain winding drum; of a driving gear fixed thereto for rotation in unison therewith; a pinion meshing with said gear; a'rotary operating shaft rotatable in reverse directions ;4 cooperating clutch means for connecting said drive shaftand pinion, said `clutch means 'including a member vmovableon said shaft and having screw threaded connection therewith, whereby the clutch member is advanced lon said shaft and engaged with the other clutch member when saidshaftis vrotated in one direction and withdrawn therefrom when the shaft'is rotated` in a reverse direction; and a locking dog for. preventing rotation of said movable clutch member in a direction corresponding to said reverse directionof rotation of said shaft. l

3. Ina hand brake mechanism, the combination with aiotary chain winding drum; of ak driving gear fixed thereto for rotating .the same;a pinion meshing with said gear; a rotary operatingv shaft; and cooperating clutch means for Vconnecting-saidoperatingV shaft and pinion for rotationin unison, said clutch means including a member having clutchteeth adapted to have clutchingk en?r1 Y gagement with the pinion, said member being asrnwvablefon said shaft and having a. lefthandedi screw threaded connectionk therewith,:

wherebythe clutch member is advanced .on

said shaft and engaged Withl the pinion when said shaft isrotated in a clockwiser4 direction and effecting rotationr of said. pinion, gear, andfchain winding drum during continued rotation of said Shaft in clockwise direction, thereby ti htening the brakes.

4:,ln. a and brake mechanism, the combination with a rotarychain Winding'drum; of

adriving gear fixed to the drumL for rotation in` unisonl therewith; a pinion meshing with said* gear; a rotaryoperating shaft rotatable in reverse directions; and cooperating clutch:

means forf connecting said ope-rating shaft and;:pinion, said clutch means including a member movable on said shaft and having clutch teeth adapted to interlock with the gear'teeth of the pinion, said member having screw threaded: connectionv with the shaft,

whereby/the clutch member is advanced on said shaft and engaged with the pinionWhe-n saidf-shaft'is rotated in one directionl and withdrawn therefrom when the shaft is rotated in a reverse direction.

Inwitness that I claim the foregoing I have hereunto subscribed my kname this 24th day of J anuary, 1930.

JOHN F'. OCONNO'R. 

